Example 1:\ Air and steam are to be electrically heated to

700\\\\deg C

. Air enters the heater at a flow of

30kgs^(-1)

and a temperature of

200\\\\deg C

. The steam enters the heater at a flow of

10kgs^(-1)

and at a temperature of

100\\\\deg C

. The water and air are at a pressure of one bar.\ What is the heater power required

(Q^())

?\

M_(r)

air

=29kgkmol^(-1),M_(r)

water

=18kgkmol^(-1)

\ \\\\table[[

T(\\\\deg C)

,Air (k/ mol'),Stram (

W

mol')],[0,-0.72,084],[100,219,254],[200,5.15,6.08]]

Air and steam are to be electrically heated to 700C. Air enters the heater at a flow of 30kgs1 and a temperature of 200C. The steam enters the heater at a flow of 10kgs1 and at a temperature of 100C. The water and air are at a pressure of one bar. What is the heater power required (Q) ? Mr air =29kgkmol1,Mr water =18kgkmol1